mysql_field_table
This function is broken in 4.4.1 (works fine in 4.3.X).
http://bugs.php.net/35536
mysql_field_type
(PHP 4, PHP 5)
mysql_field_type — Retourne le type d'une colonne MySQL spécifique
Avertissement
Cette extension est obsolète depuis PHP 5.5.0, et sera supprimée dans le futur. À la place, les extensions MySQLi ou PDO_MySQL doivent être utilisées. Voir aussi le guide MySQL : choix de l'API ainsi que la FAQ associée pour plus d'information. Voici les alternatives à cette fonction :
- mysqli_fetch_field_direct() [type]
- PDOStatement::getColumnMeta() [driver:decl_type] ou [pdo_type]
Description
string mysql_field_type
( resource
$result
, int $field_offset
)mysql_field_type() est similaire à la fonction mysql_field_name(). Les arguments sont identiques mais c'est le type de la colonne qui est retourné.
Liste de paramètres
-
result -
La ressource de résultat qui vient d'être évaluée. Ce résultat vient de l'appel à la fonction mysql_query().
-
field_offset -
La position numérique du champ.
field_offsetcommence à 0. Sifield_offsetn'existe pas, une alerteE_WARNINGsera également générée.
Valeurs de retour
Le type du champ retourné peut être : "int", "real", "string", "blob" ou d'autres, comme détaillé » dans la documentation MySQL.
Exemples
Exemple #1 Exemple avec mysql_field_type()
<?php
mysql_connect("localhost", "mysql_username", "mysql_password");
mysql_select_db("mysql");
$result = mysql_query("SELECT * FROM func");
$fields = mysql_num_fields($result);
$rows = mysql_num_rows($result);
$table = mysql_field_table($result, 0);
echo "Votre table '" . $table . "' dispose de " . $fields . " colonnes et " . $rows . " ligne(s)\n";
echo "Les colonnes sont les suivantes :\n";
for ($i=0; $i < $fields; $i++) {
$type = mysql_field_type($result, $i);
$name = mysql_field_name($result, $i);
$len = mysql_field_len($result, $i);
$flags = mysql_field_flags($result, $i);
echo $type . " " . $name . " " . $len . " " . $flags . "\n";
}
mysql_free_result($result);
mysql_close();
?>
L'exemple ci-dessus va afficher quelque chose de similaire à :
Votre table 'func' dispose de 4 colonnes et 1 ligne(s) Les colonnes sont les suivantes : string name 64 not_null primary_key binary int ret 1 not_null string dl 128 not_null string type 9 not_null enum
Notes
Note:
Pour des raisons de compatibilité ascendante, l'alias obsolète suivant peut être utilisé : mysql_fieldtype()
Voir aussi
- mysql_field_name() - Retourne le nom d'une colonne dans un résultat MySQL
- mysql_field_len() - Retourne la taille d'un champ de résultat MySQL
add a note
User Contributed Notes
mysql_field_type - [8 notes]
Anonymous ¶
7 years ago
fred at dinkler dot com ¶
6 years ago
In MySQL 4.1.x, the four TEXT types (TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT) return 'blob" as field types, not "string".
c dot futterlieb at bluewin dot ch ¶
6 years ago
Additional to the note below:
If you're using the "SHOW FIELDS" syntax, be sure that you're adding the table name instead of the db name in the "FROM" parameter:
<?php
$result = mysql_query("SHOW FIELDS FROM table");
?>
Also possible:
<?php
$result = mysql_query("SHOW FIELDS FROM table.db");
?>
or this:
<?php
$result = mysql_query("DESCRIBE table");
?>
http://dev.mysql.com/doc/refman/5.1/en/describe.html
fusionstream at gmail dot com ¶
6 years ago
krang at krang dot org dot uk
Condensed version of what KRANG said.
To get info on the MYSQL field type, use this code
<?
$result = mysql_query("SHOW FIELDS FROM db_name");
$i = 1;
while ($row = mysql_fetch_array($result)) { //go through one field at a time
echo "Field $i: ";
print_r($row) //display all information about A field which can be accessed thru the "$row" array.
$i++;
}
?>
Will display something like:
Field 1: Array ( [Field] => SN [Type] => mediumint(8) unsigned [Null] => [Key] => PRI [Default] => [Extra] => auto_increment ) , SN, mediumint(8) unsigned
Field 2: Array ( [Field] => ENTITY_ID [Type] => varchar(20) [Null] => [Key] => [Default] => [Extra] => ) , ENTITY_ID, varchar(20)
mariob at menta dot net ¶
9 years ago
For version 4.3.4, types returned are:
STRING, VAR_STRING: string
TINY, SHORT, LONG, LONGLONG, INT24: int
FLOAT, DOUBLE, DECIMAL: real
TIMESTAMP: timestamp
YEAR: year
DATE: date
TIME: time
DATETIME: datetime
TINY_BLOB, MEDIUM_BLOB, LONG_BLOB, BLOB: blob
NULL: null
Any other: unknown
swalif_mesa at hotmail dot com ¶
9 years ago
Hmm for the previous comment, note that SHOW FIELDS is an alias of SHOW COLUMNS. Very useful if you need to search the mysql-documentation. Here is the link anyway...
http://www.mysql.com/doc/en/SHOW_DATABASE_INFO.html
krang at krang dot org dot uk ¶
11 years ago
The field type returns what PHP classifies the data found in the field, not how it is stored in the database; use the following example to retrieve the MySQL information about the field....
$USERNAME = '';
$PASSWORD = '';
$DATABASE = '';
$TABLE_NAME = '';
mysql_connect('localhost', $USERNAME, $PASSWORD)
or die ("Could not connect");
$result = mysql_query("SHOW FIELDS FROM $DATABASE.$TABLE_NAME");
$i = 0;
while ($row = mysql_fetch_array($result)) {
echo $row['Field'] . ' ' . $row['Type'];
}
harald at weinreichs dot de ¶
7 years ago
The note blow seems incomplete/incorrect. For php 4.3 and mysql 4.x the returned values are:
CHAR, VARCHAR, TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT, ENUM, SET: string
TINYINT, SMALLINT, MEDIUMINT, INT, INTEGER, BIGINT: int
FLOAT, DOUBLE, DECIMAL, NUMERIC: real
TIMESTAMP: timestamp
YEAR: year
DATE: date
TIME: time
DATETIME: datetime
TINYBLOB, MEDIUMBLOB, LONGBLOB, BLOB: blob
if mysql-field-type seems to return the wrong values, you may encounter an compatibility problem of mysql, php and the libraries you use. Try reinstalling php and mysql.